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jsdnlb's questions

Martin Hope
jsdnlb
Asked: 2020-01-27 14:54:55 +0800 CST
  • 3

The architecture of the files is as follows.

enter image description here

The file package.jsoncontains the following code:

{
  "name": "my-music",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "core-js": "^3.4.4",
    "vue": "^2.6.10",
    "vuetify": "^2.1.0"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "^4.1.0",
    "@vue/cli-plugin-eslint": "^4.1.0",
    "@vue/cli-service": "^4.1.0",
    "babel-eslint": "^10.0.3",
    "eslint": "^5.16.0",
    "eslint-plugin-vue": "^5.0.0",
    "sass": "^1.19.0",
    "sass-loader": "^8.0.0",
    "vue-cli-plugin-vuetify": "^2.0.3",
    "vue-template-compiler": "^2.6.10",
    "vuetify-loader": "^1.3.0"
  },
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/essential",
      "eslint:recommended"
    ],
    "rules": {},
    "parserOptions": {
      "parser": "babel-eslint"
    }
  },
  "browserslist": [
    "> 1%",
    "last 2 versions"
  ]
}

The file firebase.jsoncontains the following code:

{
    "hosting": {
        "public": "public",
        "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
        "rewrites": [
            {
                "source": "**",
                "destination": "/index.html"
            }
        ]
    }
}

If I run my project with npm run serveit runs on my localhost on port 8080, in which case it shows the following.

enter image description here

/public/index.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width,initial-scale=1.0" />
        <link rel="icon" href="<%= BASE_URL %>favicon.ico" />
        <title>My music</title>
    </head>
    <body>
        <noscript>
            <strong>We're sorry but my-music doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
        </noscript>
        <div id="app">
            <h1>Hola</h1>
        </div>
        <!-- built files will be auto injected -->
    </body>
</html>

However when I run firebase serveit just shows me the public/index.html enter image description here

Both are supposed to show the same thing in this case, regardless of whether localhost runs on port 8080 and the server runs on port 5000.

firebase
Martin Hope
jsdnlb
Asked: 2020-12-29 08:00:17 +0800 CST
  • 5

I am using the Vue framework , [Quasar].

This is the error it shows in the console:

[Vue warn]: Error in render: "TypeError: Cannot read property 'charAt' of undefined"

This is my code:

<template>
  <q-page class="flex q-pa-md">
    <q-list class="full-width" separator="">
      <q-item
        v-for="(user, key) in users"
        :key="key"
        to="/notes"
        clickable
        v-ripple
      >
        <q-item-section avatar>
          <q-avatar color="teal" text-color="white">
            {{ user.name.charAt(0) }}
          </q-avatar>
        </q-item-section>      
      </q-item>
    </q-list>
  </q-page>
</template>
<script>
import { mapGetters } from "vuex";
export default {
  /* data() {
    return {
      users: [
        {
          id: 1,
          name: "Robert",
          online: true
        },
        {
          id: 2,
          name: "Sofia",
          online: false
        }
      ]
    };
  }, */
  computed: {
    ...mapGetters("store", ["users"])
  }
};
</script>

I have tried sending the values ​​from a [data] object and it has worked correctly, however the value comes from a [store], in a [computed()] property, when I send it from there it is when the page goes blank and shows the initial error.

javascript
Martin Hope
jsdnlb
Asked: 2020-12-15 06:05:53 +0800 CST
  • 3

I have two arrays representing the start and length indices (or it could be start and end) in this array that identify sequences of integers that I need to process. The sequences are of variable length.

x=numpy.array([2,3,5,7,9,12,15,21,27,101, 250]) # Puede tener una longitud de millones
starts=numpy.array([2,7]) # Puede tener longitudes de miles
ends=numpy.array([5,9])

# required output is x[2:5],x[7:9] in flat 1D array 
# [5,7,9,12,21,27,101]

I can easily do this with for loops, but the app is performance sensitive so I'm looking for a way to do it without the python iterator.

Any help will be gratefully received!

numpy
Martin Hope
jsdnlb
Asked: 2020-08-31 16:43:46 +0800 CST
  • 5

I'm trying to center n number of columns in a table that has DataTables receiving the parameter dynamically but it doesn't work.

I have tried with the following code, but I need the value to be dynamic, and the columns to be centered from the last to the first according to the number I send:

function makerDatatable(number){
   $('#myTable').dataTable({
      "columnDefs": [
        {"className": "text-center", "targets": number}
      ]
   }
}

Only the column with the specific number you receive is centered.

javascript
Martin Hope
jsdnlb
Asked: 2020-08-22 12:37:30 +0800 CST
  • 4

I have the following code and it works very well for me, what it does is simple.

In essence it is to verify that there is a camera connected, if it works truejust capture a photo and save it as photo.png , if it is it falseshows an error message, so far so good, now what I need to do with the photo I just took is remove the background.

It should be noted that the background will always be white, I use linux, but I think it is irrelevant.

import cv2
import numpy as np
from matplotlib import pyplot as plt
"""
    En este caso, 0 quiere decir que queremos acceder
    a la cámara 0. Si hay más cámaras, puedes ir probando
    con 1, 2, 3...
"""
cap = cv2.VideoCapture(0)
read, frame = cap.read()

if read == True:
    cv2.imwrite("foto.png", frame)
    print("Foto tomada correctamente")
else:
    print("Error al acceder a la cámara")
    #Finalmente liberamos o soltamos la cámara
cap.release()
python
Martin Hope
jsdnlb
Asked: 2020-04-24 06:06:30 +0800 CST
  • 5

I was changing the password of mysql to be able to connect a project that I have in Java, and it worked correctly for me. I used this to change mysql password.

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'newpassword';

And in fact, the project that I have in Java works well for me.

The problem that I have at the moment is the following: I open the terminal, login as root user and write, mysqlbut it shows me the following error:

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

I tried the following instructions:

 - mysql
 - mysql -u root 
 - mysqladmin -u root password [mypassword]

But the problem persists, Greetings!

mysql